Base x height x length
the first one if not the fourth
I believe FH would be a line segment.
Hope this helps!
I don’t know if this is correct: 40%
3 in the power of ten means "10^3."

How to solve exponents is to multiply the number as many times as it's exponent. So in this case you will have to multiply ten, three times.

Which would mean that....

The answer is 10^3.
Hope this helps.